After the ovulation period, the ovulation test strips may become lighter. This is a very common phenomenon, but the exact cause is not entirely clear.

After ovulation, a woman's egg may remain in the fallopian tube waiting to be fertilized, or it may have been expelled out of the fallopian tube. If this is the case, then the ovulation test strips may appear lighter.

Why may eggs become lighter after ovulation?

Some research suggests this is because after ovulation, the quality of a woman's eggs declines, making them more fragile and more susceptible to fertilization by sperm. In addition, a woman’s immune system may become more active during this period and become resistant to sperm. These factors may cause the eggs to become lighter.

In addition to egg quality and the influence of the immune system, other factors may also affect the test results of ovulation test strips. For example, a woman's hormone levels may change during this period, affecting test results.

If you are testing with ovulation test strips, please note that test results can vary based on a number of factors. If your test results become lighter, talk to your doctor to determine any possible health problems.